Discovery of an ultrasoft transient ROSAT AGN: WPVS007
| dc.creator | Grupe, D. | |
| dc.creator | Beuermann, K. | |
| dc.creator | Mannheim, K. | |
| dc.creator | Thomas, H. -C. | |
| dc.creator | deMartino, D. | |
| dc.creator | Fink, H. H. | |
| dc.date | 1995-06-14 | |
| dc.date.accessioned | 2026-07-07T02:19:52Z | |
| dc.date.available | 2026-07-07T02:19:52Z | |
| dc.description | We have identified the ROSAT source RX J0039.2-5117 with the previously almost unknown `narrow line' Seyfert 1 galaxy WPVS007 (z=0.028). The X-ray source displays quite unusual properties for an AGN. It was bright and ultrasoft in the ROSAT All-Sky Survey (RASS) and found at a level lower by a factor of ~ 400 in PSPC count rate in 1993. The implied 0.1-2.4 keV luminosity during the RASS was ~ 10^{37} W. We discuss possible explanations for the extremely soft X-ray spectrum and the observed variability. | |
| dc.description | 4 pages, gzipped, uuencoded PostScript, Letter accepted by Astron. & Astrophys., also avalailable on the web (http://www.uni-sw.gwdg.de/preprints/preprints.html) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9506087 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9506087 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/10037 | |
| dc.subject | Astrophysics | |
| dc.title | Discovery of an ultrasoft transient ROSAT AGN: WPVS007 | |
| dc.type | text |